FairValue

Checking model

Esc

  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
  • EnvironmentTerminalExplore, compare and track players; market, league and model views.
  • EnvironmentStoriesValuations, head-to-heads and research findings, told as stories.
  • TerminalPlayer ExplorerSearch, filter and sort the player export.
  • TerminalComparison StudioTwo to four players on one scale.
  • TerminalWatchlistsNamed collections, kept in this browser.
  • TerminalMarket LandscapeHow observed value is distributed, and where the model drifts.

↑ ↓ to move · Enter to open · Esc to closeLoading player index…

Mahamadou

Diawara

CMFrance · Royal Antwerp FC

№ 1053147Emerging €792k +0.23

Player dossierPro League

MahamadouDiawara

CMCentral MidfieldMidfield

Club
Royal Antwerp FC
League
Pro League
Nationality
France
Age
21
Height
187 cm
Foot
Left
Valued
4 Jun 2026

Reading the valuation

The market values Diawara at €1M. Model A, which never saw Diawara during training, estimates €792k: the market value is 26% above that estimate.

That is a factor of ×1.26. Model A's typical held-out miss is ×1.50 either way, so this gap is within its usual error.

Without league and club, Model B estimates €1.7M, further from the market. Model B is usually further off (typical miss ×2.07): league and club explain much of how the market prices players.

A gap describes the model's arithmetic for this player's inputs, not what the player is worth.

▲ +0.23A €792k▼ −0.53B €1.7M
Pitch length is a log value scale fitted to this player's figures. ● observed · ◇ Model A · dashed ◇ Model B · each arc is a residual, log(observed) − log(estimate).
Apps
27
Minutes
1,018
Goals
0
Assists
1
Started
12/27
Min / app
38
Cards
1Y 0R

Club matches, two years to the valuation date

The Valuation Journey

What moves Model A

Asking the prediction API to explain Model A for Diawara…

SHAP describes the model's arithmetic for this player's inputs, not what causes market value. Model B can be explained only by the live service; Model A also has a published explanation for the research players.

Model A vs Model B against the observed €1M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €1MModel A €792k

Asking the prediction API…

Held-out estimates come from cross-validation, with this player outside the training data: the honest comparison. Served models were refitted on every player, this one included, so they sit closer to the market. Shaded band: Model A's typical miss (×1.50 either way).

Player traitspercentiles vs 1,687 midfielders

Mahamadou Diawara's percentiles among midfielders: Goals per 90 10th, Assists per 90 48th, Minutes, two years 14th, Starts 15th, Minutes, last 365 days 9th, European club minutes 62nd10thGoals48thAssists14thMinutes15thStarts9thRecent62ndEurope

Dashed ring: the midfielder median (50th percentile)

European club minutes

Share of minutes played in UEFA club competitions.

2% this player0% midfielder median62nd percentile

0%peer deciles · median line · this player ●85%

No passing, progression or defensive actions exist in the dataset, so no trait claims to measure them.

Valuation history every Transfermarkt valuation on record

First valuation
€1M
Oct 2023
Peak
€3M
Dec 2023
Model target
€1M
Jun 2026
Valuations
8
2 club changes
Jun 2026€1MRoyal Antwerp FCValuation the model is trained to reproduce

Jun 2026: €1M, Royal Antwerp FC. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2023-10-16€1MOlympique Lyon
2023-12-18€3MOlympique Lyon
2024-06-03€3MOlympique Lyon
2024-12-10€2.5MOlympique Lyon
2025-06-03€2MLe Havre AC
2025-12-10€2MRoyal Antwerp FC
2026-03-13€1.5MRoyal Antwerp FC
2026-06-04€1MRoyal Antwerp FC

Audit context group-level, not about this player

Audit group
UEFA
Population gap, Model A
+0.093 95% CI +0.063 to +0.124
This player, market vs held-out A
+0.233

The group comes from first-listed citizenship and is never a model input. Across the population, non-UEFA players' market values sit about 10% above Model A's held-out estimates, relative to UEFA players in the same leagues. One player's residual says nothing about that pattern (typical miss ×1.50), and none of it is evidence of discrimination: the target may itself be biased. Open the Fairness Audit

In context observed value among comparable players in this build

All players in the Terminal →

Pro League350 players · median €1.8M

Valued above 27% of the 350 Pro League players.

€100k€750k€5M€30M€1MSee them in the Explorer →

Midfielders, all leagues1,687 players · median €2M

Valued above 32% of the 1,687 midfielders.

€20k€200k€2M€20M€1MSee them in the Explorer →

Where Diawara appears

Watchlists and the comparison tray are kept in this browser only.

Near this valuation closest observed values: same league, then same position

Counts and ranks of observed Transfermarkt values only; model errors are never ranked here. Full player export: Every player in the modelling population (D-011).